MIM requires high raw material powder. The choice of powder is beneficial to mixing, injection molding, degreasing and sintering. This is often contradictory. The research on MIM raw material powder includes: powder shape, particle size and particle size composition, specific surface. Etc. Table 1 lists the properties of the raw material powders most suitable for MIM.

Due to the very fine requirements of MIM raw material powder, the price of MIM raw material powder is generally higher, and some even reach 10 times the price of traditional PM powder. This is a key factor limiting the wide application of MIM technology. At present, the main method of producing raw material powder for MIM is mainly There are carbonyl method, ultra high pressure water atomization method, high pressure gas atomization method and the like.